diff options
Diffstat (limited to 'drivers/gpu/drm/drm_dsc.c')
| -rw-r--r-- | drivers/gpu/drm/drm_dsc.c | 30 |
1 files changed, 28 insertions, 2 deletions
diff --git a/drivers/gpu/drm/drm_dsc.c b/drivers/gpu/drm/drm_dsc.c index 4a475d9696ff..ff602f7ec65b 100644 --- a/drivers/gpu/drm/drm_dsc.c +++ b/drivers/gpu/drm/drm_dsc.c @@ -50,6 +50,33 @@ void drm_dsc_dp_pps_header_init(struct dp_sdp_header *pps_header) EXPORT_SYMBOL(drm_dsc_dp_pps_header_init); /** + * drm_dsc_dp_rc_buffer_size - get rc buffer size in bytes + * @rc_buffer_block_size: block size code, according to DPCD offset 62h + * @rc_buffer_size: number of blocks - 1, according to DPCD offset 63h + * + * return: + * buffer size in bytes, or 0 on invalid input + */ +int drm_dsc_dp_rc_buffer_size(u8 rc_buffer_block_size, u8 rc_buffer_size) +{ + int size = 1024 * (rc_buffer_size + 1); + + switch (rc_buffer_block_size) { + case DP_DSC_RC_BUF_BLK_SIZE_1: + return 1 * size; + case DP_DSC_RC_BUF_BLK_SIZE_4: + return 4 * size; + case DP_DSC_RC_BUF_BLK_SIZE_16: + return 16 * size; + case DP_DSC_RC_BUF_BLK_SIZE_64: + return 64 * size; + default: + return 0; + } +} +EXPORT_SYMBOL(drm_dsc_dp_rc_buffer_size); + +/** * drm_dsc_pps_payload_pack() - Populates the DSC PPS * * @pps_payload: @@ -186,8 +213,7 @@ void drm_dsc_pps_payload_pack(struct drm_dsc_picture_parameter_set *pps_payload, pps_payload->flatness_max_qp = dsc_cfg->flatness_max_qp; /* PPS 38, 39 */ - pps_payload->rc_model_size = - cpu_to_be16(DSC_RC_MODEL_SIZE_CONST); + pps_payload->rc_model_size = cpu_to_be16(dsc_cfg->rc_model_size); /* PPS 40 */ pps_payload->rc_edge_factor = DSC_RC_EDGE_FACTOR_CONST; |